Machine Learning Tutorial Python - 13: K Means Clustering Algorithm

[@codebasics]

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[@vitaltopics316]

why do we not need to use centroids for the iris dataset?

[@arrahman100]

You make Machine Learning so easy to understand. I would say you are a SAVER for the people who are struggling to understand different ML algorithums. Thank you so much. please if possible put some content on NLP.

[@hshrestha2811]

Summarizing the algorithm for K Means clustering based on this video: 1. Start with k centroids by putting them at random points here k =2 2. Compute distance of every point from centroid and cluster them accordingly 3. Adjust centroid so they become center of gravity of given cluster 4. Again recluster every point based on distance with adjusted centroid 5. Reiterate until data points stop changing cluster 6. Again adjust centroids

[@adipurnomo5683]

Noted!

[@fun_stuff_and_games]

7. done and put the ruler away

[@ganeshn9464]

Please correct me if I am wrong - 2. Compute distance of every point from centroid and cluster them accordingly - This entire process is "built" inside the KMeans.fit_predict(). Correct ?

[@ZlogsUK]

its easy to undersytand theory implementations trickyu

[@shauryabhatnagar71]

You are probably one of the best teachers I have come across. Thank you so much!

[@AltafAnsari-tf9nl]

I have started loving machine learning due to the simplicity of explanations.

[@wyphonema4024]

my grad school professor explains this very badly. You explain things very well with patience, you are the definition of a good teacher

[@codebasics]

glad you liked it :)

[@aliouahli3185]

you can't find a video and not watch all playlists , im so grateful to you , thank you sir!

[@qas4273]

It's a blessing to be able to finally say that I can learn ML, thanks to you :). I have used 'HUE' from seaborn instead of writing plt.scatter for every group of the cluster. sns.scatterplot(df['Age'], df['Income($)'], hue = df['Cluster'])

[@manishsharma2211]

Thanks for this 👍

[@codebasics]

Yes, with seaborn you can do it in one line. Thanks for posting this comment 🙏🏼🙏🏼

[@manjulakalmath4591]

Really it is invaluable and unconditional service

[@Rus1310CMRS]

I looked 5 min at start, and your teaching style for ML is spot on, better than the IIT professors. I am enjoying ML algo now. Thanks.

[@Kingsohio]

This is a great quick refresher for those with the basic knowledge of ML clustering algorithms

[@nilupulperera]

What a beautiful explanation. The beauty of Data Science is shown in this video in a remarkable way. The exercise is really beautiful! Thank you very much, Sir.

[@codebasics]

Dear Nilpul, Thanks for the comment. Keep learning. 😂

[@beansgoya]

Fantastic explanation. I like the way you showed us what happens if you don’t scale your features. You also waited for the perfect opportunity to show why we need to use the elbow method.

[@codebasics]

Thanks for your feedback kin. 👍😊 Feedback like this helps me continue do the good things and also any critical feedback is welcome as well as it helps me improve 👍

[@raom2127]

All ML series Iam following, Iam following to your vedios nicely explained you explaination ans approach is awasome now I stopped seeing all news social media network just following up your vedios only.....your vedios has magentic power........................

[@amilcarc.dasilva5665]

Excellent tutorial. This is highly recommended to watch. Thanks a lot Sir, I find it helpful in my project work....I really appreciate. You have done great work to help others. Keep up doing this great work.

[@praveenjagarlapudi7891]

I have got the real clarity after watching your video, This is a great help. Thank you for all the videos.

[@cindinishimoto9528]

All the ML series is so exciting. I'm learning and having fun during the quarantine in Brazil, SP. Thanks, @codebasics

[@NikitaSharma-bs4gg]

I searched for 3-4 days and I only got the plotting after seeing your video- Thanks a lot

[@maruthiprasad8184]

Optimal value for iris data set got 3. Thank you very much for simple & great explanation.

[@slainiae]

K Value: 3 Before scaling accuracy: 96% After scaling accuracy: 96% Twice the error occurred for the same row and four times the errors were different between the scaled and unscaled datasets.

[@andreabrunelli2030]

Dear CodeBasics, your tutorials are way better than all the classes of the Master in AI I have just completed. Thank you very much!

[@codebasics]

Glad it helped you 😊

[@akshrags-mindmaze3407]

7:25 Brilliant Explaination!

[@bhaskarg8438]

your explanation is clear and clarity in the content.. and knowledge sharing to needed Data Science community is Nobel... thankyou... 🙏

[@shivamtyagi5614]

Exercise done. viewing the initial plot n_clusters seems equal to 2, bt using ellbow method clears it to use n_clusters =3,,,,,Enjoying this holiday!!!!!!!!!!

[@commercial3750]

This was awesome! I can't believe I learned how to do K-means clustering in just a few hours. Your explanations are clear and concise. Thank you so much!

[@codebasics]

Glad it was helpful!

[@sidduhedaginal]

Sir, you made Machine Learners life easy....amazing explanation that ever seen before and by Elbow technique we got K=3 for iris dateset.

[@codebasics]

Thanks for you kind words and I am happy you liked it 😊

[@shubhangiagrawal336]

@@codebasics Sir can you please make one video on knn algorithm? I need it so badly. Thankyou

[@jayagrawal3481]

really liking the course i cant believe i already watched more than 50 videos from a playlist only 50 more to go

[@shubhamwaingade4144]

It was good, simple, informative, no errors. I guess these are enough clusters to define the quality of this video.

[@meghnasachdeva3174]

the way yoy explain is commendable making it so easy even fote beginners....thankyou so much for your efforts sir..really

[@codebasics]

👍😊🙏

[@doyoonkim4187]

The best ML lesson I've ever heard

[@Mukeshsingh-zn9rq]

was trying out tons of videos trying to understand the basics of ML, you made it so simple and quick. Loved it!!

[@codebasics]

😊👍

[@heaven3279]

Excellent quick and short explanation of K-means. Appreciate it

[@codebasics]

Glad it was helpful!

[@praveensevenhills]

great explanation taking from a small example and going in elaborative way covering whole concept in a nutshell very well explained

[@prakashdahal2560]

One of the most useful tutorial I have ever seen

[@codebasics]

🤓👍

[@tejas4054]

This is best video of all ml videos on youtube

[@fahadabdullah510]

I tried the exercise and the insights i find are: 1 -> I scatter the plots and i thought that 2 k's would be enough. 2 -> Without using any kind of scaling initially i found that my scatter plots for 2 clusters were not good enough. 3 -> I tried to scale with MinMaxScaler and StandardScaler but both seem to give the same result. 4 -> I used the elbow method and found that the optimal value for k will be 3. 5 -> I applied k = 3 and got the result.

[@flyingsalmon]

Fantastic coverage...you covered the basics, then talked about the reasons and potential challenge with real-world data, and showed some amazing methods to visualize differently. Thank you for your continued contribution to learning and sharing with the community. This kind of tutorials is what will make newcomers gravitate toward ML and be glad to learn.

[@codebasics]

Glad you enjoyed it!

[@flyingsalmon]

@@codebasics Absolutely. I do have a follow-up question. I got lost after scaling the values...let me explain. I have a dataset of tips($) and total restaurant bill($) per day per group of customers. I got 3 clusters and they look good after rescaling the bill and tips via MinMax (my x-axis is the bill for food, and y-axis is tips $). But after clustering, I can't tell how to map the x-axis and y-axis rescaled values (which are 0..1 floats) to actual dollar values that are in the dataset. I need to know how the clusters map to real dataset. Is there a way to do that logically? Would really appreciate your input. TY!

[@jiatianbu6761]

Make Machine Learning so easy to understand. Thx

[@skyblue021]

This is the best-explained K-means on the internet - period. Thank you!

[@codebasics]

Glad it was helpful!

[@santetzuken8903]

These videos are more helpful than all of the classes I took in my university combined.

[@codebasics]

I am happy this was helpful to you.

[@Saikumer-g4p]

Awesome explanation from you sir,I think this is best tutorial for k means clusters in the youtube . I tried seen lot of videos in the KZbin regrading on the this topic . But this video give me some boost to create the amazing the model in ml tq for all this sir . My feedback is : you shoud give the some more example on topics that will be help to us to make beautiful things from this

[@spacetimevideostudio109]

Thank you so much Dhaval for this video, with my elbow technique I got k=3. Thanks

[@namansinghal9090]

I must say!! you are making life alot easier for all of us!!! Thanks a lot mannn.. Your efforts are really appreciated. Keep up hard work.

[@-NagumantryRaghuveer]

best tutorials for Machine learning

[@ousmanealamakaba3135]

you are very strong .thank you so much for making this class easy

[@poojabehera8675]

Thank you so so much for making Machine learning so easy to understand by the series sir. The more i look for any ML content of yours, the more i wish to go on for the entire series with such clear understanding. with passion for the subject & curiosity to search had been gone through so many tutorials so far but codebasics is the best learning source for beginners like me and would definitely recommend this to freshers/ beginners for a clear base understanding for data science.... MUCH APPRECIATE

[@codebasics]

Thanks Pooja for your kind words. This means a lot to me and gives me a fuel to continue my work. If you like my videos would you share this series and deep learning series on your facebook page, linked in or watsapp? That way maximum people can benefit from it.

[@sajjadkhan-oc2bk]

@@codebasics Thanks for your efforts! Stay blessed...

[@mohankrishna1680]

huge respect to your hardwork , vedios increasing learning curiosity 👏👏👏👏

[@abhishek4985]

Saw so many videos, but this one video helped the most. Thanks!

[@codebasics]

Glad it helped!

[@pandaparas8500]

You make every topic so easy to understand. Long time no video, we miss your videos. Please upload video regularly. Once again good to see your videos. Thank u

[@codebasics]

Panda, thanks for your appreciation. I am going through some health issues and that's the reason not able to upload the content on regular basis. I will start uploading once I recover... 🙂

[@pandaparas8500]

@@codebasics oh sorry i m not aware of it.Its ok. Take your time and concentrate on full health recovery . Get well soon sir. Take care. Once again thank u for everything 😊

[@LamNguyen-nm1id]

both StandardScaler and MinMaxScaler worked for petal perfectly. The elbow had me at 2 and 3 but 3 seems to have a better variance than 2 upon plotting it in a scatter graph

[@sushiltry]

Superb explanation but I feel elbow plot is to be drawn initially so it is more clear about K

[@henyermogollon679]

God bless you. You are ML Guru! I love your content. very easy to understand the basics of everything.

[@saratbabum1303]

Nice way of explaining the complicated concept with an example. Great Job !!! Thanks a lot

[@zainishah5540]

Oh man just wow wow wow. You made my day what a lesson it was. Absolutely you nailed it

[@Sheblah1]

this is a perfect introduction to k-means thank you for making this video👌

[@codebasics]

Glad you liked it!

[@thaanathaana4522]

Really useful videos .. i got too many doubts in machine learning.. came up with one video became a subscriber now .. thanks brother for clear explanation

[@shashankkkk]

man you shouldn't have put these playlists on youtube for free... these are gems... people should pay to learn these gems for at least some small amount.. You are awesome sir ... The things which I wasn't able to learn you taught me in that... hats off sir... hope we will meet one day

[@codebasics]

Thanks for your appreciation, sure when I am in India I will plan for a Meetup

[@bumohamed624]

This material is brilliant, divided into theory , tutorial and exercise however I would suggest to focus on the objective which is providing solution for the problem and predict characteristic by using age and income . The predication accuracy was not been shown and do we achieve to predict correctly or not , was totally grayed end of the video . I would like to receive your further elaboration on the objective as after such effort there should be solution ,please communicate

[@pulkitgupta1946]

sir bas aap please video upload karte rehna . aapki videos se bahut help milti hai

[@codebasics]

Sure pulkit. Me koshish yahi karunga ke jyada se jyada achhe video produce karta rahu on machine learning.

[@pulkitgupta1946]

Thanks

[@adisaolaitan5475]

Thanks so much for your easy-to-understand tutorials. You are a blessing. God bless you!

[@liliyalopez8998]

I love how you explained the material in plain language. You made it very easy to follow and understand ❤

[@igorbuzov3778]

Going to university, studying, learning, reading from books And then you find some random guy form (I assume India) who exlans it in simple way.in less than 30 minutes... Respect!

[@codebasics]

I am glad Igor that this was helpful to you 😊👍

[@Mushsayer]

Thanks a lot for the video. You taught the K-Means Clustering in 10 mins!

[@codebasics]

👍☺️

[@thirugnanamselvam2304]

All your videos are clear and good. Congrats for that. Can you please make a video for recommender systems and NLP

[@codebasics]

Thanks thirugnanam, point noted!

[@kmnm9463]

Hi Dhaval ji - excellent video on KMC. Very precise in presenting, Particularly liked the cluster_centers_ and inertia_ concepts. The final elbow plot with for loop being the starting point was unparalleled in clarity. Thanks a lot

[@codebasics]

Thanks a ton

[@sufyanhamid9560]

It is very helpful to understand the working of algorithms and code also,I wish to learn your complete series of m.l.

[@codebasics]

Sufiyan I am glad you liked it. I am going to add many more tutorials in ML series. Stay tuned buddy 😎

[@86Plum]

Amazing video and explanantion! Just started learning about Machine Learning algorithms and this is incredibly helpful. Thank you!

[@sunilsharanappa7721]

You are awesome, you make the complex things simplified.Please keep up the good work.

[@codebasics]

Thanks, will do!

[@AlonAvramson]

Thank you! really enjoyed this session. I tried both Petal and Sepal and it went very well.

[@codebasics]

Glad you enjoyed it!

[@prasannavi1911]

You are awesome. You made me think ML is not complex to learn.

[@codebasics]

Indeed, ML is not as complex as people think it is !

[@prasannavi1911]

codebasics thank you. Post more videos your way to explaining things well understood.

[@sharathkrishnan1558]

Excellent, amazing . You make it so easy. Thank you sir

[@bishwadeepsikder3018]

The best explanation ever... Thank you so much

[@AntonioGarcia-ck5hy]

Thanks a lot for the tutorial video, @codebasics. You are an excellent teacher.

[@shantanuraj7086]

Amazing video. Creative, resourceful and excellent preparation. Keep posting more such videos.

[@techienomadiso8970]

Wow. You are a great man. You've made it soo simple to understand. Thank you Sir. 🔥🔥🔥

[@codebasics]

Glad you enjoyed it

[@amitblizer4567]

Very clearly explained video! Thank u very much!

[@neerajkulhari3964]

Wow.. What a nice explanation! Thank you for such a nice video

[@amrelkholy6662]

you are amazing, I like your simplicity in delivering the information, thank you very much

[@codebasics]

Glad it was helpful!

[@suhaalam2127]

Thank you so much for such well explained tutorials.

[@mapa5000]

Outstanding explanation my friend !! Thank you from Houston

[@codebasics]

👍👍😇

[@zerostudy7508]

Cool other one to my list... i love cluster Mr. @codebasics in Exercise well i also found that we can (km.predict([[7,3]])), for which cluster category label of petal length =7 and petal width= 3 but labels of clusters gave is not constant, some time they give clusters as unique labels [0 1 2] or [2 0 1] but still the same clustering though only different Labels name but same result.

[@jackthomson1336]

Good classes and good approach

[@anmoldeep0123]

What a fantastic way to expain this algorithm ? What are the practical usecases of this algo ?

[@R3NAN3224]

If you have more than 2 atributes use.. df([[ 'name', 'example]] >X ,[[ 'name', 'example]] >Y )

[@paulcurious2324]

i dont get this please could you explain in detail

[@R3NAN3224]

@@paulcurious2324 @Paul Curious hi, if you have 3 atributes.. For example: color, leaf type and flower. You need make a code using 3 separated arrays.. Inside df( [ [ 'color','green'] ],[ [ 'Leaf','small'] ] ,[ ['flower','white']] )

[@paulcurious2324]

@@R3NAN3224 it says df is not a callable when i do that

[@paulcurious2324]

@@R3NAN3224 can u send a link to an example, maybe github or repl

[@R3NAN3224]

@@paulcurious2324 see in 8:00 ... df is a name associate of your database. Paste your code here to i see you database name.

[@visakhv1805]

Hope your health is fine now. When you get time, please include some contents on Principal Component Analysis. Thank you very much for your great effort.

[@codebasics]

Hey visakh, PCA is in my Todo list. So sure I will make tutorial on that in future

[@jayshreedonga2833]

thanks your method of teaching is really nice thanks a lot

[@atifmalayalam4007]

Very clear. Thanks!

[@AjaySharma-jv6qn]

You make things quite simple. Please keep posting..

[@mayaahmed]

From the elbow graph k can be 2 or 3. Which is better? I liked k=2. Great explanation. Thanks for your video.

[@rithikaraj4687]

Excellent tutorial sir. Thank you soo much.

[@simranthiara6616]

Best channel for explanations on ML algorithms. Thank you so much :) , definitely subscribed .

[@codebasics]

Thanks and welcome

[@kalyankrishna5902]

Sir plz upload KNN algorithm video I followed your videos and learned so much of knowledge from ur videos.....tq very much sir

[@bugBusters1192]

Really must appreciate the playlist 😌

[@aviralgupta9364]

Fantastic tutorial !!! .Thanks a lot sir ... It gives best explanation

[@liqin3892]

Thank you, what an enjoyable lesson

[@ahmedadnanaziz2005]

what a great explanation , thanks teacher

[@rakeshmurali2342]

Beautiful! Superbly explained!

[@codebasics]

Glad you liked it!

[@abhijitmalode3189]

thank u so much sir for this ml video it clearly understood by everyone , it clear my all doubt

[@engineerpython4812]

I have solved the iris dataset exercise . I have k=3 and plot elbow very easily.

[@beansgoya]

not sure if anyone else had this problem but at 16:00, i had to add an extra set of brackets when i did this exercise. maybe my python is outdated or something. scaler = MinMaxScaler() scaler.fit(df[['Income($)']]) df['Income($)'] = scaler.transform(df[['Income($)']]) df

[@codebasics]

Kin, what you are doing is correct. In tutorial I got warning but ignored it but yea it takes 2D array as input. Here is my correct code: github.com/codebasics/py/blob/master/ML/13_kmeans/13_kmeans_tutorial.ipynb

[@kale_hyder]

Kin Cheng thank you so much